Tube-winding device.



G. F. JENKINS.

TUBB'WINDING DEVICE.

APPLICATION rmm 001215, 1910.

Patented Jan. 24, 1911.

2 SHEETS-11313 1.

IN a li Patented Jan. 24.1911.

2 annn'rs-snnn'r 2.

u a n u I CHARLES FRANCIS JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA.

TUBE-WINDING DEVICE.

Specification of Letters Patent.

Application filed October 15. 1910.

Patented Jan. 24. 1911.

Serial No. 587,176.

To all whom it may concern:

Be it known that I, CHARLES FRANCIS JENKINS, citizen of the UnitedStates, residing at Washington, in the District of Columbia, haveinvented certain new and useful Improvements in Tube-\Vinding De- Ivices, of which the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to machines for winding strips spirally to formtubes and involves the use of a mandrel which has lit tle contactsurfaceand which itself urges the forming tube longitudinally along themandrel.

In the accompanying drawings, Figure 1 shows the novel portion of themachine in side elevation. Fig. 2 shows the same parts in plan withstrips winding upon the mandrel. Fig. 3 is a section on the line 3-3.

Fig. 4. Fig. 4 is a vertical axial section of devices seen at the leftin Figs. 1 and 2.

Fig. 5 is an end view looking from the right.

in Fig. 1, a certain smooth mandrel segment being removed. Fig. 6 is a;View corresponding to Fig. 2, common winding belts being shown inposition- Fig. 7 is a view analogous to Fig. 5, showing a modification.Fig. 8 is a like view showing a different modification.

In these views 1 to 4, A represents a suitable frame for supporting awinding mandrel. In this frame are revolubly mounted a central shaft 13and surrounding this shaft and at equal distances therefrom and fromeach other are several shafts C all parallel to the shaft B, and likethe latter all project to the right of the frame. Upon the projectingortions of the shafts C, respectively, are fixe sleeves or hollowcylinders D, each spirally grooved to form a series of sharp ridges Danalogous to screw threads. At the right, the shafts C project slightlyand are revoluble in bearings in a disk E, forming one end of adrum-like segment or extension E of the mandrel in the axis of whichpinious ll fixed to the ends of the shafts C, respectively, so thatthese shafts are all rotated in the same direction at the same speed.The set of spirally grooved cylinders taken together form a mandrelsegment upon which strips I, usually of paper, are wound, the innerstrip forming the inner layer of a tube and the outer strip breakingjoints with the other and forming, as usual, an outer layer, the meetingfaces of the two being secured together by glue or the like. \Vhatevermeans may be employed for winding the strips, the inner layer meets thesleeves only along numerous spiral ridges and the lines of contact arecontinually shifted along the inner face of the strip, and as the sharpridges of the sleeves slightly ongage the surface, the rotation being inthe proper direction, the forming tube is constantly ur -ed to theright.

\Vith the ordinary smooth cylindrical mandrel, glue often passes throughthe spiral crevice between the edges of the strip to the mandrel, andthe slightest smearing of the mandrel thereby prevents slipping, causesthe paper, if thin, to tear or become crumpled, with the'consequencethat the work must be stopped until the mandrel has been carefullycleaned. With the resent mandrel this evil is practically e iminatedsince a little glue upon the ridges which by the rotation are positivelyfree from any given point of contact with the tube after an instantscontact, has no perceptible effect. As the formed tube advances itpasses upon the drum-like extension E after the glue has slightly set,and this drum is preferably very slightly smaller than the interior of atube which would fit over the grooved sleeves or cylinders, and is longenough to hold the tube strai ht until the setting of the glue leaves noanger or dearture from rectilineal form. Usually the ormed tube isrotated and advanced by oblique winding bolts J, without novelty. Insome instances I omit alternate shafts C, and their sleeves and supplytheir places by fixed cylindrical segments K, Fig. 6, be-

yond the general peripheral surface of which the remaining sleevesproject very slightly. I also sometimes place upon the central shaft B,Fig. 8, a sleeve or c linder D similar to those already describe andpass strips I inward between the sleeves D and allow them to wind uponthis inner cylinder or mandrel forming a smaller tube; and it is quitepossible to wind simultaneouslythe larger and smaller tubes. Whether thesmaller tube is to be fOl'i'l'lCd. alone or the two are to be woundsimultaneously, the right end .of the segment E (when this is used) isomitted and the segment is supported entirely from its left end, whichis rigidly secured tothe member E. Since the rotary shafts are allsupported at two widely separated points in the frameA and are heldproperly spaced by the member E, their resistanee to flexure ispracticall sufficient to maint 'n suitable alinement 0 the. projectingpa ts.

What I claim is:

' 1. A mandrel, for spirally wound tube making, having as its outerportion a series of parallel spirally grooved cylinders equidistantexternally from a common central axis.

2. A mandrel for spirally wound tube making having as its outer portiona series of paral distant externally from a common central axis combinedwith means for rotating all the cylinders at the same rate in the samedirection.

3. The combination with a series of equal lel spirally grooved cylindersequispirally grooved parallel cylinders equidistant from a central axis,of means for rotating all the cylinders in the same direction at thesame rate, and means for externally engaging and imparting rotary forceto a tube wound about said cylinders.

1 The combination with a spirally grooved i central mandrel, of a seriesof spirally grooved cylinders equidistant from the mandrel, parallelthereto and spaced apart to allow tube stock to pass to said mandrel,and

means for rotating the mandrel and cylin- 'ders each upon its own axis.

and means for rotating all the cylinders in the same direction and atthe same speed. In testimon whereof I aflix my signature 1n presence 0two witnesses. v

CHARLES FRANCIS JENKINS.

\Vitnesses:

ROBERT CRAIG GREENE, JAMES L. CRAWFORD.

